5.2.3.3 lab - troubleshooting basic single-area ospfv2 and ospfv3 - ilm.pdf

7/17/2019 5.2.3.3 Lab - Troubleshooting Basic Single-Area OSPFv2 and OSPFv3 - ILM.pdf

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Lab – Troubleshooting Basic Single-Area OSPFv2 and OSPFv3

(Instructor Version) Instructor Note: Red font color or Gray highlights indicate text that appears in the instructor copy only.

Topology





Addressing Table

Device

OSPF

Router ID Interface IP Address Default Gateway

R1 1.1.1.1 G0/0

192.168.1.1/24

2001:DB8:ACAD:A::1/64

FE80::1 link-local

N/A

S0/0/0

192.168.12.1/30

2001:DB8:ACAD:12::1/64

FE80::1 link-local

N/A

S0/0/1

192.18.13.1/30

2001:DB8:ACAD:13::1/64

FE80::1 link-local

N/A

R2 2.2.2.2 G0/0

192.168.2.1/24

2001:DB8:ACAD:B::2/64FE80::2 link-local

N/A

S0/0/0

192.168.12.2/30

2001:DB8:ACAD:12::2/64

FE80::2 link-local

N/A

S0/0/1

192.168.23.1/30

2001:DB8:ACAD:23::2/64

FE80::2 link-local

N/A

R3 3.3.3.3 G0/0

192.168.3.1/24

2001:DB8:ACAD:C::3/64

FE80::3 link-local

N/A

S0/0/0

192.168.13.2/30

2001:DB8:ACAD:13::3/64

FE80::3 link-local

N/A

S0/0/1

192.168.23.2/30

2001:DB8:ACAD:23::3/64

FE80::3 link-local

N/A

PC-A NIC192.168.1.3/24

2001:DB8:ACAD:A::A/64

192.168.1.1

FE80::1

PC-B NIC 192.168.2.3/242001:DB8:ACAD:B::B/64

192.168.2.1FE80::2

PC-C NIC192.168.3.3/24

2001:DB8:ACAD:C::C/64

192.168.3.1

FE80::3

Objectives

Part 1: Build the Network and Load Device Configurations





Part 2: Troubleshoot Layer 3 Connectivity

Part 3: Troubleshoot OSPFv2


Background / Scenario

Open Shortest Path First (OSPF) is a link-state routing protocol for IP networks. OSPFv2 is defined for IPv4networks, and OSPFv3 is defined for IPv6 networks. OSPFv2 and OSPFv3 are completely isolated routingprotocols, changes in OSPFv2 do not affect OSPFv3 routing, and vice versa.

In this lab, a single-area OSPF network running OSPFv2 and OSPFv3 is experiencing problems. You havebeen assigned to find the problems with the network and correct them.

Note: The routers used with CCNA hands-on labs are Cisco 1941 Integrated Services Routers (ISRs) withCisco IOS Release 15.2(4)M3 (universalk9 image). Other routers and Cisco IOS versions can be used.Depending on the model and Cisco IOS version, the commands available and output produced might varyfrom what is shown in the labs. Refer to the Router Interface Summary Table at the end of this lab for thecorrect interface identifiers.

Note: Make sure that the routers have been erased and have no startup configurations. If you are unsure,

contact your instructor.Instructor Note: Refer to the Instructor Lab Manual for the procedures to initialize and reload devices.

Required Resources

3 Routers (Cisco 1941 with Cisco IOS Release 15.2(4)M3 universal image or comparable)

3 PCs (Windows 7, Vista, or XP with terminal emulation program, such as Tera Term)

Console cables to configure the Cisco IOS devices via the console ports

Ethernet and serial cables as shown in the topology

Part 1: Build the Network and Load Device Configurations

In Part 1, you will set up the network topology and configure basic settings on the PC hosts and routers.

Step 1: Cable the network as shown in the topology.

Step 2: Configure PC hosts.

Step 3: Load router configurations.

Load the following configurations into the appropriate router. All routers have the same passwords. Theprivileged EXEC password is cisco. The password for console and vty access is class.

Router R1 Configuration:

conf t

service password-encryption

no ip domain lookup

hostname R1

enable secret class

line con 0

logging synchronous

password cisco





login

line vty 0

password cisco

login

banner motd @Unauthorized Access is Prohibited!@

ipv6 unicast-routingipv6 router ospf 1

router-id 1.1.1.1

passive-interface g0/0

interface g0/0

ip address 192.168.1.1 255.255.255.0

ipv6 address 2001:db8:acad:a::1/64

ipv6 address fe80::1 link-local

!ipv6 ospf 1 area 0

!no shutdown

interface s0/0/0

clock rate 128000

ip address 192.168.12.1 255.255.255.0

!ip address 192.168.12.1 255.255.255.252

ipv6 address 2001:db8:acad:12::1/64


ipv6 ospf 1 area 0

no shutdown

interface s0/0/1

ip address 192.168.13.1 255.255.255.0

!ip address 192.168.13.1 255.255.255.252



ipv6 ospf 1 area 0

no shutdown

router ospf 1

network 192.168.1.0 0.0.0.255 area 0

network 129.168.12.0 0.0.0.3 area 0

!network 192.168.12.0 0.0.0.3 area 0

network 192.168.13.0 0.0.0.3 area 0


!router-id 1.1.1.1

endRouter R2 Configuration:

conf t


no ip domain lookup

hostname R2

enable secret class

line con 0





logging synchronous

password cisco

login

line vty 0

password cisco

loginbanner motd @Unauthorized Access is Prohibited!@

ipv6 unicast-routing

ipv6 router ospf 1

router-id 2.2.2.2

!passive-interface g0/0

interface g0/0

ip address 192.168.2.1 255.255.255.0

ipv6 address 2001:db8:acad:B::2/64


!no ipv6 address fe80::1 link-local

!ipv6 address fe80::2 link-local

!ipv6 ospf 1 area 0

no shutdown

interface s0/0/0

ip address 192.168.12.2 255.255.255.252



ipv6 ospf 1 area 0

no shutdown

interface s0/0/1

clock rate 128000

!ip address 192.168.23.1 255.255.255.252



!ipv6 ospf 1 area 0

no shutdown

router ospf 1

network 192.168.2.0 0.0.0.255 area 0

network 192.168.12.0 0.0.0.3 area 0

network 192.168.23.0 0.0.0.3 area 0


endRouter R3 Configuration:

conf t


no ip domain lookup

enable secret class

hostname R3

line con 0





logging synchronous

password cisco

login

line vty 0

password cisco

loginbanner motd @Unauthorized Access is Prohibited!@

interface g0/0

!ip address 192.168.3.1 255.255.255.0

ipv6 address 2001:db8:acad:c::3/64


!ipv6 ospf 1 area 0

!no shutdown

interface s0/0/0

clock rate 128000

ip address 192.168.13.1 255.255.255.252

!ip address 192.168.13.2 255.255.255.252



!ipv6 ospf 1 area 0

no shutdown

interface s0/0/1

ip address 192.168.23.2 255.255.255.252



!ipv6 ospf 1 area 0

!no shutdown

!ipv6 unicast-routing

!ipv6 router ospf 1

!router-id 3.3.3.3


router ospf 1

network 192.168.3.0 0.0.0.255 area 0

!network 192.168.13.0 0.0.0.3 area 0

!network 192.168.23.0 0.0.0.3 area 0


end

Part 2: Troubleshoot Layer 3 Connectivity

In Part 2, you will verify that Layer 3 connectivity is established on all interfaces. You will need to test bothIPv4 and IPv6 connectivity for all device interfaces.





Step 1: Verify that the interfaces listed in the Addressing Table are active and configured with

the correct IP address information.

a. Issue the show ip interface brief command on all routers to verify that the interfaces are in an up/upstate. Record your findings.

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R1 - G0/0 is administratively downR2 - S0/0/1 is downR3 - G0/0 & S0/0/1 are administratively down

R1# show ip interface brief

Interface IP-Address OK? Method Status Protocol

Embedded-Service-Engine0/0 unassigned YES unset administratively down down

GigabitEthernet0/0 192.168.1.1 YES manual administratively down down

GigabitEthernet0/1 unassigned YES unset administratively down downSerial0/0/0 192.168.12.1 YES manual up up

Serial0/0/1 192.168.13.1 YES manual up up

R2# show ip interface bri



GigabitEthernet0/0 192.168.2.1 YES manual up up

GigabitEthernet0/1 unassigned YES unset administratively down down


Serial0/0/1 unassigned YES unset down down

R3# show ip interface bri






Serial0/0/1 192.168.23.2 YES manual administratively down down

b. Issue the show run interface command to verify IP address assignments on all router interfaces.Compare the interface IP addresses against the Addressing Table and verify the subnet maskassignments. For IPv6, verify that the link-local address has been assigned. Record your findings.

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R1 – S0/0/0 & S0/0/1 incorrect subnet mask, should be 255.255.255.252R2 – G0/0 incorrect IPv6 link local address, S0/0/1 no IPv4 addressR3 – G0/0 no IPv4 address, S0/0/0 incorrect IPv4 address

--R1 Intefaces --





R1# show run interface g0/0

Building configuration...

Current configuration : 178 bytes

!

interface GigabitEthernet0/0

ip address 192.168.1.1 255.255.255.0

shutdown

duplex auto

speed auto

ipv6 address FE80::1 link-local

ipv6 address 2001:DB8:ACAD:A::1/64

end

R1# show run interface s0/0/0


Current configuration : 158 bytes!

interface Serial0/0/0

ip address 192.168.12.1 255.255.255.0


ipv6 address 2001:DB8:ACAD:12::1/64

ipv6 ospf 1 area 0

clock rate 2000000

end




!


ip address 192.168.13.1 255.255.255.0



ipv6 ospf 1 area 0

end

--R2 Interfaces --

R2# show run interface g0/0 Building configuration...


!


ip address 192.168.2.1 255.255.255.0

duplex auto





speed auto


ipv6 address 2001:DB8:ACAD:B::2/64

end




!


ip address 192.168.12.2 255.255.255.252



ipv6 ospf 1 area 0

end

R2# show run interface s0/0/1 Building configuration...


!


no ip address



clock rate 128000

end

--R3 Interfaces --

R3# show run interface g0/0



!


no ip address

shutdown

duplex auto

speed auto

ipv6 address FE80::3 link-localipv6 address 2001:DB8:ACAD:C::3/64

end








!


ip address 192.168.13.1 255.255.255.252



clock rate 128000

end




!


ip address 192.168.23.2 255.255.255.252

shutdown


ipv6 address 2001:DB8:ACAD:23::3/64end

c. Resolve all problems that are found. Record the commands used to correct the issues.

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R1(config)# interface g0/0

R1(config-if)# no shutdown

R1(config-if)# interface s0/0/0

R1(config-if)# ip address 192.168.12.1 255.255.255.252



R1(config-if)# end


R2(config-if)# no ipv6 address fe80::1 link-local

R2(config-if)# ipv6 address fe80::2 link-local



R2(config-if)# end







R3(config-if)# no shutdown



R3(config-if)# interface s0/0/1 R3(config-if)# no shutdown

R3(config-if)# end

d. Using the ping command, verify that each router has network connectivity with the serial interfaces on theneighbor routers. Verify that the PCs can ping their default gateways. If problems still exist, continuetroubleshooting Layer 3 issues.


In Part 3, you will troubleshoot OSPFv2 problems and make the necessary changes needed to establishOSPFv2 routes and end-to-end IPv4 connectivity.

Note: LAN (G0/0) interfaces should not advertise OSPF routing information, but routes to these networks

should be in the routing tables.

Step 1: Test IPv4 end-to-end connectivity.

From each PC host, ping the other PC hosts in the topology to verify end-to-end connectivity.

Note: It may be necessary to disable the PC firewall before testing, to ping between PCs.

a. Ping from PC-A to PC-B. Were the pings successful? _____________ No

b. Ping from PC-A to PC-C. Were the pings successful? _____________ No

c. Ping from PC-B to PC-C. Were the pings successful? _____________ No

Step 2: Verify that all interfaces are assigned to OSPFv2 area 0 on R1.

a. Issue the show ip protocols command to verify that OSPF is running and that all networks areadvertised in area 0. Verify that the router ID is set correctly. Record your findings.

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Router ID is incorrectly configured. The router ID should be 1.1.1.1, not 192.168.13.1. The network129.168.12.0 0.0.0.3 area 0 statement is incorrect. The network statement should be for 192.168.12.0/30.

R1# show ip protocols

*** IP Routing is NSF aware ***

Routing Protocol is "ospf 1"

Outgoing update filter list for all interfaces is not set

Incoming update filter list for all interfaces is not set

Router ID 192.168.13.1

Number of areas in this router is 1. 1 normal 0 stub 0 nssa

Maximum path: 4

Routing for Networks:

129.168.12.0 0.0.0.3 area 0





192.168.1.0 0.0.0.255 area 0

192.168.13.0 0.0.0.3 area 0

Routing Information Sources:

Gateway Distance Last Update

Distance: (default is 110)

b. Make the necessary changes to the configuration on R1 based on the output from the show ip protocols command. Record the commands used to correct the issues.

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R1(config)# router ospf 1

R1(config-router)# no network 129.168.12.0 0.0.0.3 area 0

R1(config-router)# network 192.168.12.0 0.0.0.3 area 0

R1(config-router)# router-id 1.1.1.1

R1(config-router)# end

c. Issue the clear ip ospf process command if necessary.d. Re-issue the show ip protocols command to verify that your changes had the desired effect.

e. Issue the show ip ospf interface brief command to verify that all interfaces are listed as OSPF networksassigned to area 0.

R1# show ip ospf interface brief

Interface PID Area IP Address/Mask Cost State Nbrs F/C

Se0/0/0 1 0 192.168.12.1/30 64 P2P 1/1

Se0/0/1 1 0 192.168.13.1/30 64 P2P 0/0

Gi0/0 1 0 192.168.1.1/24 1 DR 0/0

f. Issue the show ip ospf interface g0/0 command to verify that G0/0 is a passive interface.

Note: This information is also in the show ip protocols command.R1# show ip ospf interface g0/0

GigabitEthernet0/0 is up, line protocol is up

Internet Address 192.168.1.1/24, Area 0, Attached via Network Statement

Process ID 1, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 1

Topology-MTID Cost Disabled Shutdown Topology Name

0 1 no no Base

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 1.1.1.1, Interface address 192.168.1.1

No backup designated router on this network

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

oob-resync timeout 40

No Hellos (Passive interface)

Supports Link-local Signaling (LLS)

Cisco NSF helper support enabled

IETF NSF helper support enabled

Index 1/1, flood queue length 0

Next 0x0(0)/0x0(0)

Last flood scan length is 0, maximum is 0

Last flood scan time is 0 msec, maximum is 0 msec





Neighbor Count is 0, Adjacent neighbor count is 0

Suppress hello for 0 neighbor(s)

g. Resolve any problems discovered on R1. List any additional changes made to R1. If no problems werefound on the device, then respond with “no problems were found”.

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No problems were found

Instructor Note: The passive interface command was configured correctly in the original configs.


a. Issue the show ip protocols command to verify that OSPF is running and that all networks are beingadvertised in area 0. Verify that the router ID is set correctly. Record your findings.

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Router ID is incorrect 192.168.12.2. The correct router ID is 2.2.2.2.






Router ID 192.168.12.2


Maximum path: 4


192.168.2.0 0.0.0.255 area 0

192.168.12.0 0.0.0.3 area 0192.168.23.0 0.0.0.3 area 0



1.1.1.1 110 00:16:38

192.168.13.1 110 00:17:01



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c. Issue the clear ip ospf process command if necessary.

d. Re-issue the show ip protocols command to verify that your changes had the desired effect.






R2# sh ip ospf interface brief

Interface PID Area IP Address/Mask Cost State Nbrs F/C

Se0/0/1 1 0 192.168.23.1/30 64 P2P 0/0

Se0/0/0 1 0 192.168.12.2/30 64 P2P 1/1

Gi0/0 1 0 192.168.2.1/24 1 DR 0/0

f. Issue the show ip ospf interface g0/0 command to verify that G0/0 is a passive interface.Note: This information is also available from the show ip protocols command.

R2# show ip ospf interface g0/0





0 1 no no Base




Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5oob-resync timeout 40

Hello due in 00:00:00





Next 0x0(0)/0x0(0)






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R2(config-router)# passive-interface g0/0


a. Issue the show ip protocols command to verify that OSPF is running and that all networks are beingadvertised in area 0. Verify that the router ID is set correctly as well. Record your findings.

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The router ID, 192.168.13.1 is incorrectly configured. The correct router ID for R3 is 3.3.3.3. The networkstatements for 192.168.13.0/30 and 192.168.23.0/30 are missing.










Router ID 192.168.13.1


Maximum path: 4


192.168.3.0 0.0.0.255 area 0

Passive Interface(s):

GigabitEthernet0/0





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c. Issue the clear ip ospf process command if necessary.

d. Re-issue the show ip protocols command to verify that your changes had the desired effect.


R3# show ip ospf interface brief Interface PID Area IP Address/Mask Cost State Nbrs F/C

Se0/0/1 1 0 192.168.23.2/30 64 P2P 1/1

Se0/0/0 1 0 192.168.13.2/30 64 P2P 1/1

Gi0/0 1 0 192.168.3.1/24 1 DR 0/0

f. Issue the show ip ospf interface g0/0 command to verify that G0/0 is a passive interface.

Note: This information is also in the show ip protocols command.

R3# show ip ospf interface g0/0





0 1 no no Base





oob-resync timeout 40










Next 0x0(0)/0x0(0)






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No problems were found

Instructor Note: The passive interface command was configured correctly in the original configuration.

Step 5: Verify OSPF neighbor information.

a. Issue the show ip ospf neighbor command on all routers to view the OSPF neighbor information.

R1# show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface

2.2.2.2 0 FULL/ - 00:00:38 192.168.12.2 Serial0/0/0

3.3.3.3 0 FULL/ - 00:00:36 192.168.13.2 Serial0/0/1



3.3.3.3 0 FULL/ - 00:00:33 192.168.23.2 Serial0/0/1

1.1.1.1 0 FULL/ - 00:00:35 192.168.12.1 Serial0/0/0



2.2.2.2 0 FULL/ - 00:00:31 192.168.23.1 Serial0/0/1

1.1.1.1 0 FULL/ - 00:00:32 192.168.13.1 Serial0/0/0

Step 6: Verify OSPFv2 Routing Information.

a. Issue the show ip route ospf command to verify that each router has OSPFv2 routes to all non-adjoiningnetworks.

R1# show ip route ospf

Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP





+ - replicated route, % - next hop override

Gateway of last resort is not set

O 192.168.2.0/24 [110/65] via 192.168.12.2, 00:26:56, Serial0/0/0

O 192.168.3.0/24 [110/65] via 192.168.13.2, 00:12:20, Serial0/0/1

192.168.23.0/30 is subnetted, 1 subnets

O 192.168.23.0 [110/128] via 192.168.13.2, 00:12:20, Serial0/0/1

[110/128] via 192.168.12.2, 00:26:56, Serial0/0/0








o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP+ - replicated route, % - next hop override


O 192.168.1.0/24 [110/65] via 192.168.12.1, 00:32:23, Serial0/0/0

O 192.168.3.0/24 [110/65] via 192.168.23.2, 00:17:47, Serial0/0/1


O 192.168.13.0 [110/128] via 192.168.23.2, 00:17:47, Serial0/0/1

[110/128] via 192.168.12.1, 00:32:23, Serial0/0/0








o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP

+ - replicated route, % - next hop override


O 192.168.1.0/24 [110/65] via 192.168.13.1, 00:14:12, Serial0/0/0O 192.168.2.0/24 [110/65] via 192.168.23.1, 00:14:12, Serial0/0/1


O 192.168.12.0 [110/128] via 192.168.23.1, 00:14:12, Serial0/0/1

[110/128] via 192.168.13.1, 00:14:12, Serial0/0/0

Are all OSPFv2 routes available? ________ yes

If any OSPFv2 routes are missing, what is missing?

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All OSPFv2 routes are present.

b. If any routing information is missing, resolve these issues.

Instructor Note: All problems should have been resolved.

Step 7: Verify IPv4 end-to-end connectivity.

From each PC, verify that IPv4 end-to-end connectivity exists. PCs should be able to ping the other PC hostsin the topology. If IPv4 end-to-end connectivity does not exist, then continue troubleshooting to resolve anyremaining issues.

Note: It may be necessary to disable the PC firewall to ping between PCs.


In Part 4, you will troubleshoot OSPFv3 problems and make the necessary changes needed to establishOSPFv3 routes and end-to-end IPv6 connectivity.

Note: LAN (G0/0) interfaces should not advertise OSPFv3 routing information, but routes to these networksshould be contained in the routing tables.

Step 1: Test IPv6 end-to-end connectivity.

From each PC host, ping the IPv6 addresses of the other PC hosts in the topology to verify IPv6 end-to-endconnectivity.


Step 2: Verify that IPv6 unicast routing has been enabled on all routers.

a. An easy way to verify that IPv6 routing has been enabled on a router is to use the show run | sectionipv6 unicast command. By adding this pipe (|) section to the show run command, the ipv6 unicast-routing command displays if IPv6 routing has been enabled.

Note: The show run command can also be issued without any pipe, and then a manual search for the

ipv6 unicast-routing command can be done.Issue the command on each router. Record your findings.

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R3 does not have ipv6 unicast routing enabled.

R1# show run | section ipv6 unicast





R3#

b. If IPv6 unicast routing is not enabled on one or more routers, enable it now. Record the commands usedto correct the issues.

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R3(config)# ipv6 unicast-routing


a. Issue the show ipv6 protocols command and verify that the router ID is correct. Also verify that the

expected interfaces are displayed under area 0.Note: If no output is generated from this command, then the OSPFv3 process has not been configured.

Record your findings.

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Router ID is correct. The network for G0/0 interface is advertised in the OSPFv3 process.

R1# show ipv6 protocols

IPv6 Routing Protocol is "connected"

IPv6 Routing Protocol is "ospf 1"

Router ID 1.1.1.1

Number of areas: 1 normal, 0 stub, 0 nssa

Interfaces (Area 0):

Serial0/0/1

Serial0/0/0

Redistribution:

None

IPv6 Routing Protocol is "ND"

b. Make the necessary configuration changes to R1. Record the commands used to correct the issues.

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R1(config-if)# ipv6 ospf 1 area 0

c. Issue the clear ipv6 ospf process command if necessary.

d. Re-issue the show ipv6 protocols command to verify that your changes had the desired effect.

e. Issue the show ipv6 ospf interface brief command to verify that all interfaces are listed as OSPFnetworks assigned to area 0.

f. Issue the show ipv6 ospf interface g0/0 command to verify that this interface is set not to advertiseOSPFv3 routes.

R1# show ipv6 ospf interface g0/0


Link Local Address FE80::1, Interface ID 3

Area 0, Process ID 1, Instance ID 0, Router ID 1.1.1.1

Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State WAITING, Priority 1

No designated router on this network








Wait time before Designated router selection 00:00:23

Graceful restart helper support enabled

Index 1/3/3, flood queue length 0

Next 0x0(0)/0x0(0)/0x0(0)






____________________________________________________________________________________

No problems were found, G0/0 is already a passive OSPFv3 interface.


a. Issue the show ipv6 protocols command and verify the router ID is correct. Also verify that the expectedinterfaces display under area 0.

Note: If no output is generated from this command, then the OSPFv3 process has not been configured.


____________________________________________________________________________________

____________________________________________________________________________________

____________________________________________________________________________________

Router ID is correct, interfaces G0/0 & S0/0/1 are missing


IPv6 Routing Protocol is "connected"

IPv6 Routing Protocol is "ospf 1"

Router ID 2.2.2.2

Number of areas: 1 normal, 0 stub, 0 nssa

Interfaces (Area 0):

Serial0/0/0

Redistribution:

None

IPv6 Routing Protocol is "ND"


____________________________________________________________________________________

____________________________________________________________________________________

____________________________________________________________________________________












f. Issue the show ipv6 ospf interface g0/0 command to verify that this interface is not set to advertiseOSPFv3 routes.

R2# show ipv6 ospf interface g0/0GigabitEthernet0/0 is up, line protocol is up




Transmit Delay is 1 sec, State WAITING, Priority 1

No designated router on this network



Hello due in 00:00:04

Wait time before Designated router selection 00:00:05



Next 0x0(0)/0x0(0)/0x0(0)





g. List any additional changes made to R2. If no problems were found on the device, then respond with “noproblems were found”.

____________________________________________________________________________________

R2(config)# ipv6 router ospf 1

R2(config-rtr)# passive-interface g0/0


a. Issue the show ipv6 protocols command and verify that the router ID is correct. Also verify that theexpected interfaces display under area 0.

Note: If no output is generated from this command, then the OSPFv3 process has not been configured.


____________________________________________________________________________________

____________________________________________________________________________________

____________________________________________________________________________________

OSPFv3 has not been configured on this router.



____________________________________________________________________________________

____________________________________________________________________________________

____________________________________________________________________________________





R3(config)# ipv6 router ospf 1

R3(config-rtr)# router-id 3.3.3.3

R3(config-rtr)# passive-interface g0/0

R3(config-rtr)# interface g0/0


R3(config-if)# interface s0/0/0R3(config-if)# ipv6 ospf 1 area 0






f. Issue the show ipv6 ospf interface g0/0 command to verify that this interface is set not to advertiseOSPFv3 routes.

R3# show ipv6 ospf interface g0/0GigabitEthernet0/0 is up, line protocol is up





Designated Router (ID) 3.3.3.3, local address FE80::3






Next 0x0(0)/0x0(0)/0x0(0)






____________________________________________________________________________________

No problems were found as long as G0/0 was configured as a passive OSPFv3 interface in Step 5b.

Step 6: Verify that all routers have correct neighbor adjacency information.

a. Issue the show ipv6 ospf neighbor command to verify that adjacencies have formed betweenneighboring routers.

R1# show ipv6 ospf neighbor

OSPFv3 Router with ID (1.1.1.1) (Process ID 1)

Neighbor ID Pri State Dead Time Interface ID Interface





3.3.3.3 0 FULL/ - 00:00:34 6 Serial0/0/1

2.2.2.2 0 FULL/ - 00:00:32 6 Serial0/0/0

R2# sh ipv6 ospf neighbor



3.3.3.3 0 FULL/ - 00:00:32 7 Serial0/0/1

1.1.1.1 0 FULL/ - 00:00:30 6 Serial0/0/0

R3# sh ipv6 ospf neighbor



2.2.2.2 0 FULL/ - 00:00:32 7 Serial0/0/1

1.1.1.1 0 FULL/ - 00:00:37 7 Serial0/0/0

b. Resolve any OSPFv3 adjacency issues that still exist.

Instructor Note: All adjacency issues should have been resolved in earlier steps.

Step 7: Verify OSPFv3 routing information.

a. Issue the show ipv6 route ospf command, and verify that OSPFv3 routes exist to all non-adjoiningnetworks.

R1# show ipv6 route ospf

IPv6 Routing Table - default - 10 entries

Codes: C - Connected, L - Local, S - Static, U - Per-user Static route

B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2

IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external

ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect

O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2

ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2

O 2001:DB8:ACAD:B::/64 [110/65]

via FE80::2, Serial0/0/0

O 2001:DB8:ACAD:C::/64 [110/65]


O 2001:DB8:ACAD:23::/64 [110/128]















O 2001:DB8:ACAD:A::/64 [110/65]


O 2001:DB8:ACAD:C::/64 [110/65]


O 2001:DB8:ACAD:13::/64 [110/128]











O 2001:DB8:ACAD:A::/64 [110/65]via FE80::1, Serial0/0/0

O 2001:DB8:ACAD:B::/64 [110/65]


O 2001:DB8:ACAD:12::/64 [110/128]



Are all OSPFv3 routes available? ________ yes

If any OSPFv3 routes are missing, what is missing?

____________________________________________________________________________________

All OSPFv3 routes are present.

b. Resolve any routing issues that still exist.

Instructor Note: All OSPFv3 routes issues should have been resolved.

Step 8: Verify IPv6 end-to-end connectivity.

From each PC, verify that IPv6 end-to-end connectivity exists. PCs should be able to ping each interface onthe network. If IPv6 end-to-end connectivity does not exist, then continue troubleshooting to resolve remainingissues.


Reflection

Why would you troubleshoot OSPFv2 and OSPFv3 separately?

_______________________________________________________________________________________

_______________________________________________________________________________________

OSPFv2 and OSPFv3 do not share routing information and their configuration is completely independent.Troubleshooting for these two protocols should be done independently.





Router Interface Summary Table

Router Interface Summary

Router Model Ethernet Interface #1 Ethernet Interface #2 Serial Interface #1 Serial Interface #2

1800 Fast Ethernet 0/0(F0/0)

Fast Ethernet 0/1(F0/1)

Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)

1900 Gigabit Ethernet 0/0(G0/0)

Gigabit Ethernet 0/1(G0/1)

Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)



Serial 0/1/0 (S0/1/0) Serial 0/1/1 (S0/1/1)



Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)

2900 Gigabit Ethernet 0/0(G0/0)

Gigabit Ethernet 0/1(G0/1)

Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)

Note: To find out how the router is configured, look at the interfaces to identify the type of router and how manyinterfaces the router has. There is no way to effectively list all the combinations of configurations for each routerclass. This table includes identifiers for the possible combinations of Ethernet and Serial interfaces in the device.The table does not include any other type of interface, even though a specific router may contain one. Anexample of this might be an ISDN BRI interface. The string in parenthesis is the legal abbreviation that can beused in Cisco IOS commands to represent the interface.

Device Configs - Final

Router R1

R1#sh run



!

version 15.2

service timestamps debug datetime msec

service timestamps log datetime msec


!

hostname R1

!

boot-start-marker

boot-end-marker!

enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2

!

no aaa new-model

memory-size iomem 15

!

ip cef

!





no ip domain lookup


ipv6 cef

multilink bundle-name authenticated

!

interface Embedded-Service-Engine0/0

no ip address

shutdown

!


ip address 192.168.1.1 255.255.255.0

duplex auto

speed auto


ipv6 address 2001:DB8:ACAD:A::1/64

ipv6 ospf 1 area 0

!


no ip address

shutdown

duplex auto

speed auto

!


ip address 192.168.12.1 255.255.255.252



ipv6 ospf 1 area 0

clock rate 128000

!interface Serial0/0/1

ip address 192.168.13.1 255.255.255.252



ipv6 ospf 1 area 0

!

router ospf 1

router-id 1.1.1.1

passive-interface GigabitEthernet0/0

network 192.168.1.0 0.0.0.255 area 0

network 192.168.12.0 0.0.0.3 area 0

network 192.168.13.0 0.0.0.3 area 0!

ip forward-protocol nd

!

no ip http server

no ip http secure-server

!

ipv6 router ospf 1





router-id 1.1.1.1


!

control-plane

!

banner motd ^CUnauthorized Access is Prohibited!^C

!

line con 0

password 7 060506324F41

logging synchronous

login

line aux 0

line 2

no activation-character

no exec

transport preferred none

transport input all

transport output pad telnet rlogin lapb-ta mop udptn v120 ssh

stopbits 1

line vty 0

password 7 00071A150754

login

transport input all

line vty 1 4

login

transport input all

!

scheduler allocate 20000 1000

!

end

Router R2

R2#sh run



!

version 15.2




!

hostname R2

!

boot-start-marker

boot-end-marker

!


!





no aaa new-model


!

ip cef

!

no ip domain lookup


ipv6 cef


!


no ip address

shutdown

!


ip address 192.168.2.1 255.255.255.0

duplex auto

speed auto


ipv6 address 2001:DB8:ACAD:B::2/64

ipv6 ospf 1 area 0

!


no ip address

shutdown

duplex auto

speed auto

!


ip address 192.168.12.2 255.255.255.252ipv6 address FE80::2 link-local


ipv6 ospf 1 area 0

!


ip address 192.168.23.1 255.255.255.252



ipv6 ospf 1 area 0

clock rate 128000

!

router ospf 1router-id 2.2.2.2


network 192.168.2.0 0.0.0.255 area 0

network 192.168.12.0 0.0.0.3 area 0

network 192.168.23.0 0.0.0.3 area 0

!






!

no ip http server


!

ipv6 router ospf 1

router-id 2.2.2.2


!

control-plane

!


!

line con 0

password 7 094F471A1A0A

logging synchronous

login

line aux 0

line 2


no exec


transport input all


stopbits 1

line vty 0

password 7 14141B180F0B

login

transport input all

line vty 1 4

logintransport input all

!


!

end

Router R3

R3#sh run



!

version 15.2




!

hostname R3

!





boot-start-marker

boot-end-marker

!


!

no aaa new-model


!

ip cef

!

no ip domain lookup


ipv6 cef


!

!


no ip address

shutdown

!


ip address 192.168.3.1 255.255.255.0

duplex auto

speed auto


ipv6 address 2001:DB8:ACAD:C::3/64

ipv6 ospf 1 area 0

!


no ip addressshutdown

duplex auto

speed auto

!


ip address 192.168.13.2 255.255.255.252



ipv6 ospf 1 area 0

clock rate 128000

!

interface Serial0/0/1ip address 192.168.23.2 255.255.255.252



ipv6 ospf 1 area 0

!

router ospf 1

router-id 3.3.3.3





network 192.168.3.0 0.0.0.255 area 0

network 192.168.13.0 0.0.0.3 area 0

network 192.168.23.0 0.0.0.3 area 0

!


!

no ip http server


!

ipv6 router ospf 1

router-id 3.3.3.3


!

control-plane

!


!

line con 0

password 7 02050D480809

logging synchronous

login

line aux 0

line 2


no exec


transport input all


stopbits 1line vty 0

password 7 104D000A0618

login

transport input all

line vty 1 4

login

transport input all

!


!

end

5.2.3.3 lab - troubleshooting basic single-area ospfv2 and ospfv3 - ilm.pdf

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